Photographic film magazine



Filed Nov. .4, 1939 ALOYSJUS ELECHLEITNER INVENTORf MM ffl/m04 BY Y `ATTORNE S TIIIIIIIII/WIIIIIII.

-Patented May 6, 1941 UNITED STATES PATENT oFFlcE PHOTOGRAPHIC FILM MAGAZINE Aloysius E. Lechleitner, Rochester, N. Y., assignor to Eastman Kodak Company. Rochester, N. Y.,

a corporation of New Jersey Application November 4, 1939, Serial No. 302,909

Ciaims.

This invention relates to a photographic nlm magazine and more particularly to a nlm magazine having a noating gate member.

It is known to the prior` art that noating gate members may be used advantageously in nlm magazines. It is also known` that the lateral wall .of a magazine casing may be embossed forengagement with the margins of film in the magazine to prevent abrasion oi the central or picture areasof the nlm.

The primary object of thepresent invention is the provision of a nlm magazine having `a noating gate member and includinga resilient member encircling the casing and adjacent the lateral wall thereof, having nlm-engaging portions for engaging only the margins of a nlm strip to prevent abrasion of the central area thereof and also engaging said noating gate member to urge the same toward the lateral wall of the magazine casing.

A further object of the invention is the provision of a noating gate member or nlm guiding member within the magazine casing and having a displaced portion in which a magazine shutter is movably mounted, the thickne of said shutter being equal to thedepth of said displaced portion of the nlm guiding member so that the resilient means acting upon the nlm guiding member normally urges the same toward the lateral wall oi' the magazine, so that the magazine shutter is frictionally gripped bef tween said lateral wall and said'displaced por- Zine accordingy to the. invention and showing the positionof `the, internal parts of the maga- 4, f zine when it is associated with a camera.

i Fig. 2 is a fragmentary longitudinal section of :the nlm gateof the magazine showing the internal parts in" normal position or when the `magazine isnot "associated with the camera.- Q'Fig.f3\is`a` transverse' cross section through 'll lthe nlm gate'takenon the line`3-3 of Fig. 1.

i4' is afragmentary longitudinal section of theA magazine showing the modined arrangeimenqofjthe encircling band therein.

" -5j-is af fragmentary transverse section of the magazine wall taken on the line S-l of Fig. 1.

As illustrated herein, the nlm magazine may com-prise a magazine casing I0 having a side wall II, a cover I2, see Figs. 3 and 5, and having a lateral wall I3 extending around the edges of said wall II. The side walls of the magazine, such as side wall II, may be provided with embossings I4 for engaging the side edges of the nlm and reduce its area of contact with said side walls.

The nlm supply may be arranged within the magazine in any known manner. One arrangement for the nlm supply may comprise a supply nlm core I5 having teeth I8 and rotatably mounted upon a spindle I1 which is fastened to the side wall II. provided with an axial opening I3 and is rotatably mounted on a spindle, not shown, on the cover I2.

The nlm gate is of the noating type and comprises a nlm guide 20, a pressure pad 2|, and a support 22 having end clips 23 ntting over posts 24 on side wall Il. The front portion of lateral wall I3 is provided with one-or more exposure apertures 25 and a plurality of holes 26. The nlm guide 20 has a plurality of protuberances 21 arranged to nt into holes 23, has side nanges 23 spaced for-side guiding of the nlm at the gate and has a displaced portion 23 which is also provided with one or more exposure apertures 30 corresponding to the exposure apertures 2l in lateral wall I3.

A shutter member 3I is attached to a shutter operating pin 32 which is journaled at its inner end in the nlm guide 20 and which has a square portion 33 extending through the front portion of lateral wall I3. Said shutter member 3| is arranged in a known manner to be movable into a closed position forcovering the exposure apertures 25 and 30 and into an open position for uncovering said exposure apertures 25 and 33. In thepresent instance movement or rotation of the shutter member4 3Ifis accomplished by rotating the square'portiony 33 of the shutter operating pin 32. 'I'he shutter member Il has a thickness equalto the depth of the displaced portion 29 in nlm guide 2li.

A nlm within the magazine .extends from supply nlm roll 3l on supply nlm core Il over the Vend clips 23 of support 22 'between the lide The take-upnlm core "I3 isa headed stud 36 passing through an opening in support 22 and which is urged forwardly by a conical spiral spring 31 between pressure pad 2| and support 22. In order to prevent abrasion or scratching of the picture areas of the film strip F, the nlm guide or nlm contacting surface of the displaced portion 23 is provided with nlm-engaging ridges 38 and the front face of pressure pad 2| is .provided with longitudinal ridges 38.

It has previously been the custom to provide resilient mean-s for urging the noating gate member toward or through the lateral wall of the nlm magazine and separate or independent nlm guiding means to prevent the nlm in its passage Within the magazine from becoming scratched by the lateral wall of the magazine casing. According to the present invention these formerly separate means are now consolidated into a single resilient member or spring band 40 which encircles the magazine casing' I0 adjacent the lateral wall I3, which has film engaging portions 4I for engaging only the margins of the nlm to prevent abrasion of the central area thereof, and having its ends arranged to engage the nlm guide 20 to urgeit toward the lateral wall I3. The nlm engaging portions 4I are preferably embossed into the spring band 40 to form spaced parallel ridges extending around said spring band 40, see Fig. 5. The ends of spring band 40 have offset portions 4|I and 40" which engage the undisplaced portion of nlm guide 20 to urge the same toward the lateral wall I3. Said offset portions 40 and 40"-of lthe spring band 40 also serve to support the nlm guide 20 with its protuberances 21 in registry with the holes 26 in lateral wall I3 and with its exposure apertures 30 in registry with the exposures in lateral wall I3.

Rivets 42 are preferably used and fasten the spring band to the lateral Wall I3 near the opposite ends of the nlm gate or adjacent the ends of nlm guide 20. The spacing of said rivets 42 from the nlm guide 20 maybe varied as desired to increase or decrease the spring pressure exerted upon the nlm guide 20.

Alternatively, the rivets 42 may be eliminated, see Fig. 4, and the spring band 40 formed of stiff or tempered spring stock. In this manner assembly of .the magazine parts is facilitated and the advantages of the invention are also obtained.

Before the film magazine is inserted into its associated apparatus, the spring band 46 or off-set ends 40 or 40" thereof press the undisplaced portions of nlm guide 20 against the front portion of lateral wall I3 and urge protuberances 21 into holes 26 of lateral wall I3 in dust and light-sealing relationship. Since shutter member 3| is equal in thickness to the depth of displaced portion 29,

said shutter member 3| will be simultaneouslyl and",I frictionally gripped between the lateral wall I3 and the displaced portion 29 of nlm guide 20.

1 As a result, more resistance is offered to move- 45 for registry with exposure apertures 25 and 30 of the magazine and which carries a plurality of projections 46 arranged to enter the holes 26 in the lateral Wall I3 of the magazine. Said front plate 44 is `also provided with an opening 41 to' receive thesquare portion 33 of the shutter operating pin 32.'

When the nlm magazine is inserted into the apparatus or camera with its exposure apertures 25 and 30 in alignment with said exposure opening 45, the projections 46 on front plate 44 enter the holes 26 in the lateral wall I3 of the magazine and abut against theprotuberances 21 on nlm guide 20 to displace said nlm guide 20 with respect to lateral wall I3. Such displacement of that it may be more freely operated or moved to open or closed positions.

Upon operation of the apparatus or magazine camera, the inherent resiliency of the nlm may cause portions of the nlm to expand and rub against the nlm-engaging portions 4| of spring band 4l). However, the parallel and spaced ar.- rangement of said nlm-engaging portions 4I to engage only the margins of the nlm F will prevent the central or picture areas of said nlm F from becoming `scratched.` Thus the resilient member or spring band 40 performs two functions, one to exert the resilient pressure on nlm guide 20 and urge it forwardly toward the lateral wall I3, the other to prevent abrasion or scratching of the central areas of the nlm F as just explained.

Since, modifications of the present invention can be made without departing from the spirit of the invention, the present disclosure is to be construed in an illustrative sense and the scope of the invention is denned by the claims which follow.

Having now particularly described my invention what I desire to secure by Letters Patent 'of the United States and what I claim is:

1. In a nlm magazine, the combination with a casing having a lateral wall provided with an exposure aperture, and a nlm gate adjacent said lateral wall and includinga nlm guide movable toward and away from said wall and for guiding a nlm past said exposure aperture in parallel relation to said lateral wall, of a resilient member encircling said casing adjacent said lateral wall, having nlm engaging portions for engaging only the margins of a nlm to prevent abrasion of the central area thereof and engaging said nlm guide to urge the same toward said lateral wall.

2. In a nlm magazine, `the combination with a casing having a lateral Wall provided with an exposure aperture, a pair of nlm cores rotatably mounted in said casing for rotation about ames kparallel to said lateral-wall, and a nlm gate adjacent said lateral wall and including a film guide movable toward and away from 'said lateral wall`and parallel thereto for guiding a nlm, in its path from one nlm core to the other. past said exposure aperture, of a spring member encircling said nlm' cores adjacent said lateral wall, having nlm engaging portions for engag- Q eralv wall, having parallel embossed ridgesspaced to engage only the margins of a lm and prevent abrasion of the central area thereof and having its ends oil-set to support said nlm. guide and press the same toward said lateral wall.

4. In a nlm magazine, the combination with a casing having a lateral wall provided with an exposure aperture, a pair of illm cores rotatably mounted in said casing for rotation about axes parallel to said lateral wall, and a film gate adjacent said lateral wall and including a nlm guide movable toward and away Irom'said lateral wall and parallel thereto for guiding a nlm, in its path from one nlm core to the other. past said exposure aperture, of a spring band encircling said casing within and adjacent said lateral wall. having parallel embossed ridges spaced to engage only'the margins of a film, and having its ends oiI-set to overlap and support said nlm guide and for pressing said guide toward said lateral wall, and fastening means be- Cil tween said lateral wall and said spring band adjacent said film. guide.

5. In a nlm magazine. the combination with a casing having a wall provided with an exposure aperture, a nlm guiding member movable within said casing toward and way from said wall and-having a displaced portion prolvided with an aperture, and a shutter member movably mounted within said displaced portion and for covering and uncovering said apertures. the thickness of said shutter member` being equal to the depth ofV said displaced portion of the iilm guiding member, of a resilient means engaging said lm guiding member and normally urging the same toward said wall so that said shutter member is frictionally gripped between said wall and the displaced portion of said 111m. guiding member and so that the imdisplaced part of said film guiding member is pressed against said Wall.

ALOYSIUS E. I IECELEITNER. 

